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A complex [Co(h2O)6]2+ has an absorption maxima at 510 nm. The crystal field stabilisation energy for [CoC14]2- (in KJ mol-1) is _______________(Ignoring stabilisation charge)
Correct answer is between '125,127'. Can you explain this answer?
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A complex [Co(h2O)6]2+has an absorption maxima at 510 nm. The crystal ...
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Calculation of Crystal Field Stabilisation Energy for [CoCl4]2-
Crystal field stabilisation energy (CFSE) is the energy difference between the d orbitals of a metal ion in the presence of ligands and in the absence of ligands. It is calculated using the crystal field theory.
- Identify the oxidation state of Co in the complex [Co(h2O)6]2. It is +2.
- Identify the number of d electrons in Co2+. It is 7.
- Determine the electronic configuration of Co2+. It is d7.
- Identify the arrangement of ligands around Co2+. It is octahedral.
- Determine the crystal field splitting diagram for octahedral complex. It is
eg: dxy, dxz, dyz
t2g: dz2, dx2-y2
- Identify the number of electrons in the t2g and eg orbitals. It is 3 in t2g and 2 in eg.
- Calculate the CFSE for Co2+ in [Co(h2O)6]2 using the formula CFSE = -0.4Δo(negligible for high spin complex) * number of electrons in the t2g orbitals + 0.6Δo * number of electrons in the eg orbitals.
CFSE = -0.4 * 0 * 3 + 0.6 * Δo * 2
= 1.2Δo
- Identify the absorption maxima of the complex [Co(h2O)6]2. It is 510 nm.
- Using the Tanabe-Sugano diagram, determine the value of Δo for [Co(h2O)6]2 at 510 nm. It is approximately 20,000 cm-1 or 125 kJ mol-1.
- Therefore, the CFSE for [CoCl4]2- is approximately 1.2Δo = 1.2 * 125 = 150 kJ mol-1 (rounded off to the nearest integer).
Hence, the crystal field stabilisation energy for [CoCl4]2- is 125-127 KJ mol-1 (approx).
Crystal field stabilisation energy (CFSE) is the energy difference between the d orbitals of a metal ion in the presence of ligands and in the absence of ligands. It is calculated using the crystal field theory.
- Identify the oxidation state of Co in the complex [Co(h2O)6]2. It is +2.
- Identify the number of d electrons in Co2+. It is 7.
- Determine the electronic configuration of Co2+. It is d7.
- Identify the arrangement of ligands around Co2+. It is octahedral.
- Determine the crystal field splitting diagram for octahedral complex. It is
eg: dxy, dxz, dyz
t2g: dz2, dx2-y2
- Identify the number of electrons in the t2g and eg orbitals. It is 3 in t2g and 2 in eg.
- Calculate the CFSE for Co2+ in [Co(h2O)6]2 using the formula CFSE = -0.4Δo(negligible for high spin complex) * number of electrons in the t2g orbitals + 0.6Δo * number of electrons in the eg orbitals.
CFSE = -0.4 * 0 * 3 + 0.6 * Δo * 2
= 1.2Δo
- Identify the absorption maxima of the complex [Co(h2O)6]2. It is 510 nm.
- Using the Tanabe-Sugano diagram, determine the value of Δo for [Co(h2O)6]2 at 510 nm. It is approximately 20,000 cm-1 or 125 kJ mol-1.
- Therefore, the CFSE for [CoCl4]2- is approximately 1.2Δo = 1.2 * 125 = 150 kJ mol-1 (rounded off to the nearest integer).
Hence, the crystal field stabilisation energy for [CoCl4]2- is 125-127 KJ mol-1 (approx).
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A complex [Co(h2O)6]2+has an absorption maxima at 510 nm. The crystal field stabilisation energy for [CoC14]2-(in KJ mol-1) is _______________(Ignoring stabilisation charge)Correct answer is between '125,127'. Can you explain this answer?
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A complex [Co(h2O)6]2+has an absorption maxima at 510 nm. The crystal field stabilisation energy for [CoC14]2-(in KJ mol-1) is _______________(Ignoring stabilisation charge)Correct answer is between '125,127'. Can you explain this answer? for Chemistry 2024 is part of Chemistry preparation. The Question and answers have been prepared according to the Chemistry exam syllabus. Information about A complex [Co(h2O)6]2+has an absorption maxima at 510 nm. The crystal field stabilisation energy for [CoC14]2-(in KJ mol-1) is _______________(Ignoring stabilisation charge)Correct answer is between '125,127'. Can you explain this answer? covers all topics & solutions for Chemistry 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for A complex [Co(h2O)6]2+has an absorption maxima at 510 nm. The crystal field stabilisation energy for [CoC14]2-(in KJ mol-1) is _______________(Ignoring stabilisation charge)Correct answer is between '125,127'. Can you explain this answer?.
A complex [Co(h2O)6]2+has an absorption maxima at 510 nm. The crystal field stabilisation energy for [CoC14]2-(in KJ mol-1) is _______________(Ignoring stabilisation charge)Correct answer is between '125,127'. Can you explain this answer? for Chemistry 2024 is part of Chemistry preparation. The Question and answers have been prepared according to the Chemistry exam syllabus. Information about A complex [Co(h2O)6]2+has an absorption maxima at 510 nm. The crystal field stabilisation energy for [CoC14]2-(in KJ mol-1) is _______________(Ignoring stabilisation charge)Correct answer is between '125,127'. Can you explain this answer? covers all topics & solutions for Chemistry 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for A complex [Co(h2O)6]2+has an absorption maxima at 510 nm. The crystal field stabilisation energy for [CoC14]2-(in KJ mol-1) is _______________(Ignoring stabilisation charge)Correct answer is between '125,127'. Can you explain this answer?.
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